<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>数学学习助手</title>
    <link href="assets/css/bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="assets/css/bootstrap-icons.css">
    <style>
        .nav-pills .nav-link {
            color: #666;
            border: none;
            padding: 10px 20px;
        }
        .nav-pills .nav-link.active {
            background: none;
            color: #40E0D0;
            border-bottom: 2px solid #40E0D0;
        }
        .card {
            border-radius: 12px;
            margin-bottom: 15px;
        }
        .bottom-nav {
            position: fixed;
            bottom: 0;
            width: 100%;
            background: white;
            padding: 10px 0;
            border-top: 1px solid #eee;
        }
        .countdown {
            font-size: 2.5rem;
            color: #40E0D0;
        }
        .search-box {
            background: #f5f5f5;
            border-radius: 20px;
            padding: 8px 15px;
            margin: 10px 15px;
        }
    </style>
</head>
<body class="bg-light">
    <!-- 倒计时区域 -->
    <div class="container mb-4">
        <div class="d-flex align-items-center justify-content-between">
            <div>
                <span class="countdown">393</span>
                <span>DAYS</span>
                <p class="text-muted mb-0">距离考研</p>
            </div>
            <button class="btn btn-outline-primary">
                <i class="bi bi-chat-dots-fill"></i>
                消息提醒
            </button>
        </div>
    </div>

    <!-- 科目导航 -->
    <ul class="nav nav-pills mb-3 px-3" id="subjects-tab">
        <li class="nav-item">
            <a class="nav-link" href="index.html">英语</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="politics.html">政治</a>
        </li>
        <li class="nav-item">
            <a class="nav-link active" href="math.html">数学</a>
        </li>
    </ul>

    <!-- 功能卡片区域 -->
    <div class="container">
        <a href="math-real.html" class="text-decoration-none">
            <div class="card bg-primary text-white">
                <div class="card-body">
                    <h5 class="card-title">历年数学真题</h5>
                    <p class="card-text">覆盖98-24年，系统练习、查漏补缺</p>
                </div>
            </div>
        </a>

        <a href="math-wrong.html" class="text-decoration-none">
            <div class="card bg-danger text-white">
                <div class="card-body">
                    <h5 class="card-title">错题本</h5>
                    <p class="card-text">记录做错的题目，针对性复习</p>
                </div>
            </div>
        </a>

    </div>

    <!-- 底部导航 -->
    <div class="bottom-nav">
        <div class="d-flex justify-content-around">
            <div class="text-center">
                <a href="index.html" class="text-decoration-none text-dark">
                    <i class="bi bi-house-door"></i>
                    <div>首页</div>
                </a>
            </div>
            <div class="text-center">
                <a href="qa.html" class="text-decoration-none text-dark">
                    <i class="bi bi-chat-dots-fill"></i>
                    <div>答疑</div>
                </a>
            </div>
            <div class="text-center">
                <a href="profile.html" class="text-decoration-none text-dark">
                    <i class="bi bi-person"></i>
                    <div>我的</div>
                </a>
            </div>
        </div>
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</body>
</html>